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Effect of shear deformation on microstructure and texture evolution in commercially pure titanium
Philosophical Magazine ( IF 1.6 ) Pub Date : 2021-05-05 , DOI: 10.1080/14786435.2021.1919332
B. Bishoyi 1 , R. K. Sabat 2 , S. Suwas 3 , S. K. Sahoo 1
Affiliation  

ABSTRACT

The role of shear strain and deformation temperature on the microstructure and texture evolution in commercially pure (CP) titanium was investigated in the present study. CP titanium samples were subjected to free-end torsion at elevated temperatures, starting from room temperature (298 K) to 873 K, for different shear strains of 0.5–2.5. Deformation twins of {101¯2} type were observed in the samples deformed at lower temperatures (up to 673 K). Deformation bands were seen in some of the grains and the number of such grains was observed to be decreased with increasing the deformation temperature. Such deformation bands were observed to be facilitated prismatic slip at room temperature and basal slip at high temperatures. However, the presence of deformation twinning always favoured basal slip activity in twinned grains. Dynamically recrystallized grains were observed in the samples deformed at higher temperatures. The texture evolution in the samples was observed to be controlled mainly by activities of basal, prismatic and pyramidal <c + a> slips. Further, the ideal C1 and C2 fibres were found to be unstable during torsion of the samples and the ideal B fibres were observed in the samples deformed at a temperature of 873 K for a shear strain of 2.5.



中文翻译:

剪切变形对工业纯钛组织和织构演变的影响

摘要

本研究研究了剪切应变和变形温度对商业纯 (CP) 钛的微观结构和织构演变的作用。CP 钛样品在升高的温度下经受自由端扭转,从室温 (298 K) 到 873 K,不同的剪切应变为 0.5-2.5。{10 的变形双胞胎1¯在较低温度(高达 673 K)下变形的样品中观察到 2} 型。在一些晶粒中观察到变形带,并且观察到这种晶粒的数量随着变形温度的升高而减少。观察到这种变形带在室温下促进了棱柱滑移,在高温下促进了基底滑移。然而,变形孪晶的存在总是有利于孪晶晶粒的基底滑移活动。在较高温度下变形的样品中观察到动态再结晶晶粒。观察到样品中的织构演变主要受基底、棱柱和锥体<c + a>滑移的活动控制。此外,理想的C 1C 2 发现纤维在样品扭转过程中不稳定,在 873 K 温度下变形的样品中观察到理想的 B 纤维,剪切应变为 2.5。

更新日期:2021-06-18
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